Carbureter.



WITNESSES."

W. a. NAGEL. OMBEBURBTERJ APPLiUATIDN TILED MAY 22, 1911. I 1,016,169. Patented Jan'. 30,1912.

' o Ff [Z /I q \l 1 i i l0 ix v To all whom it may concern UNITED sT TEs Parana o IoE.

WILLIAM G. NAGEL', or TOLEDO, onro, ASSIGNOR or ONE-THIRD T ISAAC 'xnvsnv' AND ONE-THIRD 'ro FRANK COLLINS, BOTH or TOLEDO, onro.

Specification of Letters Patent.

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Patented Jan. 30,1912.

Application filed May 22, 1911. Serial N0..628, 696.

Be it known that I, WILLIAM G. NAGEL, a citizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Carbureters; and I do hereby declare thev following to be a full,

. clear, and exact description of the invention,-such as will enable others skilled in the art to which it appertains to make anduse the same, reference being had to the accompanying drawings, and to the figures of reference. marked thereon, which form a part of this specification.

My'invention relates to carbureters and more particularly to the adjustment of'the needle valve which controls the fiow of the liquid fuel to the mixing-chamber, and the operation.

object thereof is to provide means whereby the movable needle-valve of a carhureter may be .quickly and easily adjusted from outside the carbureter while the engine is in Whilemy invention is especially adapted for use in connection with the type of carbureter shown in'United States Letters Patent. No. 988,502, of April 4, 1911', it is also intended for use in connection with any of the numerous makes of carbureters to which it maybe applied.

It has long been common in the art to provide meansexternalof the carbureter for adjusting the position of a fixed or stationary needle-valve with relation to its seat, andit is also old to provide external means for adjusting the relative movements of the air and liquid fuel valves, but so far as I am aware I am the first to devise means externalof the carbureter for adjusting the initial setting of a needle-valve having a longitudinal movement independent of such movement of adjustment.

In carbureters in which the movements ofa liquid fuel valve of the needle type toward and from its seat are automatically controlled by the movements of an air-valve 'it has been found in practice to be extremely difficult to secure an accurate initial adjust- -1nent or setting of the needle-valve, for the reason that such adjustment can only be made by stopping theengine, removing'the valve and its associated parts from the carbureter, changing the adjustment, replacing the valve and associated parts, and again starting the engine. This operation has to be repeated until the proper adjustment is secured. It also frequently happens that in removing and replacing these parts other adjustments are unintentionally changed,

thus causing still further annoyance. By

the use of my invention'the initial adjust- Inent or set-ting of the needle-valve can be quickly and easily made from the outside of the carbureter while the engine is running and without danger of interfering with other adjustments, and after such initial setting is accomplished other adjustments,

such as the adjustment of the relative movements of the needle-valve to the movements of the air-valve, may be madewithout changing or interfering with such initial adjustment, thus saving an immense amount of' time and annoyanceand resulting in a more perfect adjustment of the carbureter;

It is a well known fact that the richness of the mixture required to secure the bestresults from a hydrocarbonengine varies with the temperature of the atmosphere and that a perfect adjustment of a carbureter for summer months will not give satisfactory results in the winter months and vice versa. This is especially true .upon the starting of the engine after it has become cold and while the engine is running at slow speed, say from one to ten miles an hour, a much richer mixture being required in: cold weatherthan in warm weather. As comparatively few automobile owners are capable of adjusting ter to meet changed conditions of tempera ture. By the use of my invention the adjustment of the needle-valve is madeuso, snnple'that any person may make it,. the

I only requirement being the slight turning of an adjusting part located at a convenient point on the exterior of the carbureter. V,

The invention is fully described in the following specification, and while, in its broader aspect, it is capable of embodiment in numerous forms, a preferred embodi ment thereof is illustrated in the accompanying drawings, in-which, Figung t is a side view of the carbureter partly in elevation and partly in verticalsection, illustrating the application of my invention. Fig. 2 is the needle valve and associated parts, and Fig. 3 is a top plan view thereof.

an enlarged detail of Referring to the drawings, 1 designates the carbureting chamber of a carburetor, one end of which is provided'with an airsupply inlet 2,'which is normally closed by a valve 3 that is v opened by engine suction, while the other end thereof is provided 'with an outlet passage as is usual in carbureters of this type.

4; designates a float chamber for the liquid fuel, and this chamber has communication through a passage ,5 with the interior of the arbureting chamber. A needle-valve 6 controls the quantity of feed of the liquid fuel to the carbureting chamber from the liquidfuel nozzle 7 A sleeve 8 surrounds and supports the needle-valve and carries a bearing screw or pin 9, which is threaded through or otherwise secured in a lug projecting laterally from said sleeve. Said screw or pin is adapted to bear at its lower end upon an annular surface provided on the upper side of a lever or actuating member 10, which is fulcrumed within the carbureting chambr at one side of the nozzle, as at 11, and has its opposite or free end connected by a link 12 to'the air-valve 3, whereby an opening movement of the air-valve will raise said lever and impart an opening movement to the needle 6 through the medium of the screw 9 and member 8.

A hollow plug 13 is revolubly seated within an annular flange 14:, extending from the side of the carbureter casing, and this plug 13 is provided with a bore 15 extending lon itudinally through a side portion thereof into which the outer end of a screw 9 projects, so that a turning of the plug 13 in its seat moves the point of contact between the screw 9 and lever 10 with reference to the fulcrum of said lever.

The connections above described provide means for externally adjusting the movement of the gasolene-valve with reference to the opening movement of the air-valve, as fully described in said Patent No. 988,502. My invention relatesto the means for adjusting the initial setting or minimum opening of the needle-valve for regulating the feed of gasolene during the starting or slow running of an engine, during which time the air-valve is but slightly raised ofi' its seat. By the term initial setting or minimum opening of the needle-valve I refer to the position of said valve with reference to its seat at such times as the air-' valve is closed. In practice I have found that in the summer months the initial set- 'justment of the needle-valve in the following manner: All annular shoulder 16 is formed on the upper end portion of the valve-stem and rests on top of the sleeve 8,

being yieldingly held thereto by means of a coiled spring 17, which bears against said shoulder and the closed end of the hollow plug 13, thus causing longitudinal movements of the sleeve 8 to be commun cated to the needle-valve. The upper end of the screw 9, which extends through the bore 15, is squared or of other suitable irregular shape in cross-section, .and is adapted to have longitudinal movements through a correspondingly-shaped socket in a part 18, which is'fined in any suitable manner to the adjusting-head .19., which latter is mounted for rotatable movements on top of the plug-13 and in. line with the bore 15 therein. The part 18 is shown in the present instance as cooperating with the outer end portion of the plug 13 to retain the adjusting-head 19 seated for free rotary movements thereon. The top of the adjustinghead 19. is provided with a dial 20, with which a finger-'21, secured to the plug 13,

cooperates to ai'ford a scale'of adjustments.

The periphery of the adjusting-head is roughened as at 22 to provide a gripping surface for the fingers. It will be apparent from the above description that a turning of the adjusting-head 19 causes a turning of the screw 9 and a consequent raising or lowering of the needle-valve with reference to its seat. I

I wish it understood-that my invention is not limited to use in connection with any particular type of carbureter or to any specific construction or arrangement of parts,

except in so far as such limitations are speci fied in the claims.

Having thus described my invention, what I claim as new and 'desire'to secure by Letters Patent, is,'

1. In a carbureter, a liquid fuel valve, a suction valve, a lever movable by opening movements of the suction valve to impart opening movements to the liquid fuel val e, adjustable means associated with the liquid fuel valve and coacting with the lever to communicate movements fromthe latter to the former, said means being adjustable both to regulate the minimum opening of the liquid fuel valve and the opening movements thereof. and-means with'outthe carbureter operable to adjust said adjustable means to regulate the minimum opening of the liquid fuel valve but permitting free reciprocal movements of the adjustable means with the liquid fuel valve.

2. In a carbureter, a reciprocally movable liquid fuel valve, an air-valve, a member movable by movements of the air-valve, an

adjusting said connection to regulate the opening movements of the liquid fuel valve, and means external of the carbureter permitting free reciprocal movements of saidliquid fuel valve and connection and operable to regulate the minimum opening of the I means for causing opening movements to be communicated to the liquid fuel valve from movements of said member, said means having a reciprocally movable part which threads into another part thereof and is of irregular form in cross-section for a portion of its length, and .an external rotatable adjusting head which permits said reciprocally movable part to have free 'reciprocal movements relative-thereto and is operable to turn such part within the part into which it is threaded, the relative adjusting of said parts effecting an adjustment of the liquid fuel valve relative to the lever.

4. In a carbureter, an air valve, a valve for liquid fuel, means connecting said valves for imparting opening movements from one to. the other," said connecting means having parts which are relatively adjustable to reg; ulate the minimum opening movements of" the liquid fuel valve,- one of said parts having a stem projecting therefrom which is of irregular form in cross-section,, and a member external to the carburetor having a socket complement-a1 to said stem within which the latter rojects for free reci rocal movements, said member being a apted when rotated to effect a relative adjustment of the parts ofsaid connecting means.

5. In acarbureter, an air valve, a liquid fuel valve, a lever disposed transversely of the fuel valve and movable by the air valve.

amembercarrying the. fuel valve, a part threaded to said member-and having com tact with the lever, means'for'revolubly adjusting said part relative to the lever to change its point of contact therewith, and rotatable means which permits said part to have free reciprocal movements and is oper able from without the carbureter ,to 'turn said part within said member to regulate the minimum opening ofthe fuel valve.

6. In'a carbureteig an' air valve, a liquid fuel i valve, a lever movable by the air valve,

a-revoluble member carrying the fuel valve,

a partthreaded through said member and forming an adjustable, connection between the member and lever, a cap rot-atably carried by the carbureter and having a socket at one side of its axis-into which said art reciprocally projects, said cap. being a apted when rotated to revolve said member and part" to. Jcha-ngethe point of contact of the latter with the lever to re late the maximum opening movements og the fuel valve, and means "Without the carbureter which permits said'part to have free reciprocal movements and is operable to rotate-said part to adjust 1t relative to said member to. regulate the minimum opening of the valve.

In testimony whereof, I have hereunto signed my name to this specification in the presence of two subscribing witnesses.

' I v G. NA'GEL'. Witnesses: I Q WILBER A. OWEN,

E. E. THoMAs.

Copies of this patent may be obtained for {iv scents each, by addressing the Gommissioner 'of Batents,

' Washington, D. G3 1 Y 

